What is Mastering?
Mastering is the final step in music production. Imagine: The mix is the painting, mastering is the frame and lighting in the gallery. It ensures that your track:
- Sounds good on all systems from phone speaker to club sound system
- Is commercially loud enough without distorting
- Is consistent with other tracks not too quiet or too loud in a playlist
- Is technically flawless no clipping, correct formats
LUFS: The Loudness Revolution
In the past, volume was measured in Peak Level (the highest peaks). The problem: A track with compressed dynamics sounds louder than one with natural dynamics, even if both reach the same peak.
LUFS (Loudness Units Full Scale) is the modern solution. It measures how loud a track actually sounds to the human ear.
The LUFS Scale
🎵 Target for Streaming: -14 LUFS integrated
This is the standard for Spotify, YouTube Music, Apple Music, and most platforms. If you're below, they'll make your track louder. If you're above, they'll make it quieter with possible quality loss.
Important Terms
- Integrated LUFS: The average loudness of the entire track
- Short-term LUFS: Loudness of the last 3 seconds (shows moments)
- True Peak: The absolute maximum, including between samples (should be below -1 dB)
- Dynamic Range (LRA): How much does the loudness vary? (4-8 LU is normal for modern music)
The Mastering Chain
A typical mastering goes through these stages in this order:
1. Gain Staging
Make sure your mix comes in with enough headroom. Ideally, you should peak at -6 dB to -3 dB. This gives you room for the mastering tools to work.
2. EQ (Equalizer)
Fine adjustments, not radical changes:
- High-Pass Filter: Remove below 20-30 Hz (there's only unnecessary rumble there)
- Air Band: Slight boost at 12-16 kHz for "brilliance" (max +1 dB)
- Low-End: Small cut at 200-250 Hz for more clarity (max -1 dB)
- Presence: Slight boost at 2-4 kHz for definition
3. Compression
Multiband compression (e.g., in Audacity: no multiband available, so skip or use free plugin) controls different frequency ranges separately:
- Low-Band: Controls the bass, prevents "boominess"
- Mid-Band: Binds vocals and instruments together
- High-Band: Keeps highs in check, prevents harshness
4. Limiter (The Most Important Step)
The limiter is the gatekeeper of your loudness:
- Set the Output Ceiling to -1.0 dB (True Peak safety)
- Reduce the Threshold until you reach about -14 LUFS
- Gain Reduction should not exceed 3-6 dB (otherwise it sounds squashed)
Free Mastering Tools
YouLean Loudness Meter
Shows exactly your LUFS, True Peak, and Dynamic Range. Essential!
Download →Platform-Specific Exports
Every platform has its preferences. Here are the most important ones:
| Platform | Format | Target LUFS | Special Features |
|---|---|---|---|
| Spotify | WAV 44.1kHz/16bit | -14 LUFS | Normalizes to -14 LUFS |
| YouTube | WAV 48kHz/24bit | -14 LUFS | Higher resolution = better |
| SoundCloud | WAV 44.1kHz/16bit | -8 to -10 LUFS | Allows louder tracks |
| Bandcamp | FLAC 48kHz/24bit | -14 LUFS | Lossless formats possible |
The Mastering Workflow
🎵 Mastering Checklist
1. Load References
Load 2-3 commercial tracks from your genre into your project. Compare loudness and sound.
2. Gain Staging
Make sure your mix comes in with -6 to -3 dB headroom.
3. High-Pass Filter
Filter out below 30 Hz. This relieves the limiter and makes the bass more defined.
4. EQ Adjustments
Fine corrections: Air-Band boost (+0.5 dB), mid clarity (subtle cut at 250 Hz).
5. Set Limiter
Output Ceiling: -1.0 dB. Lower Threshold until -14 LUFS reached. Max 6 dB Gain Reduction.
6. Check LUFS
With YouLean Meter: Integrated LUFS should be -14, True Peak below -1 dB.
7. A/B Comparison
Switch between your master and references. Does it sound similarly loud and professional?
8. Test on Different Systems
Export and listen on: headphones, speakers, phone speaker, car.
9. Export
WAV 44.1kHz/16bit for streaming. For archive: WAV 48kHz/24bit or FLAC.
Common Mastering Mistakes
A track at -8 LUFS sounds "better" on first listen, but becomes tiring over time. Streaming platforms turn it down anyway.
If the limiter constantly shows 10+ dB Gain Reduction, you're destroying the dynamics. The track sounds "squashed" and lifeless.
Even if your peak meter shows below 0 dB, "True Peaks" (between the samples) can clip. Always use a True Peak limiter!
If the mix has problems (e.g., too much bass), you won't solve them in mastering. Go back to the mix!
Quick Mastering in Audacity
If you don't have external plugins, you can do a "Quick Mastering" in Audacity:
- Normalize: Effect → Normalize → Peak Level: -3 dB
- EQ: Effect → Filter Curve EQ → Preset "Bass Boost" slightly adjust or Custom:
- High-Pass at 30 Hz (steep slope)
- Slight shelving boost at 10 kHz (+2 dB)
- Compression: Effect → Compressor → Threshold -20 dB, Ratio 3:1, Attack 0.2s, Release 1.0s
- Limiter: Effect → Limiter → Type "Soft Limit", Limit to -2.0 dB, adjust Input Gain so it's loud enough
- Normalize final: Effect → Normalize → Peak Level: -1 dB
🎵 Final Project: Master Your Track
- Take one of your produced tracks (e.g., from Module 07 or 08)
- Install YouLean Loudness Meter (Free)
- Apply the mastering checklist
- Aim for -14 LUFS, True Peak below -1 dB
- Export as WAV 44.1kHz/16bit
- Compare with a commercial reference at the same volume
- Upload your finished, mastered track!
What's Next?
In Module 10, you'll learn how to share your music with the community, get feedback, and plan your first release.